jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1MarkSweep.hpp@a248d0be1309

8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com

     1 /*

     2  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP

    28 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"

    29 #include "gc_implementation/g1/heapRegion.hpp"

    30 #include "memory/genMarkSweep.hpp"

    31 #include "memory/generation.hpp"

    32 #include "memory/universe.hpp"

    33 #include "oops/markOop.hpp"

    34 #include "oops/oop.hpp"

    35 #include "runtime/timer.hpp"

    36 #include "utilities/growableArray.hpp"

    38 class ReferenceProcessor;

    40 // G1MarkSweep takes care of global mark-compact garbage collection for a

    41 // G1CollectedHeap using a four-phase pointer forwarding algorithm.  All

    42 // generations are assumed to support marking; those that can also support

    43 // compaction.

    44 //

    45 // Class unloading will only occur when a full gc is invoked.

    46 class G1PrepareCompactClosure;

    48 class G1MarkSweep : AllStatic {

    49   friend class VM_G1MarkSweep;

    50   friend class Scavenge;

    52  public:

    54   static void invoke_at_safepoint(ReferenceProcessor* rp,

    55                                   bool clear_all_softrefs);

    57   static STWGCTimer* gc_timer() { return GenMarkSweep::_gc_timer; }

    58   static SerialOldTracer* gc_tracer() { return GenMarkSweep::_gc_tracer; }

    60  private:

    62   // Mark live objects

    63   static void mark_sweep_phase1(bool& marked_for_deopt,

    64                                 bool clear_all_softrefs);

    65   // Calculate new addresses

    66   static void mark_sweep_phase2();

    67   // Update pointers

    68   static void mark_sweep_phase3();

    69   // Move objects to new positions

    70   static void mark_sweep_phase4();

    72   static void allocate_stacks();

    73   static void prepare_compaction();

    74   static void prepare_compaction_work(G1PrepareCompactClosure* blk);

    75 };

    77 class G1PrepareCompactClosure : public HeapRegionClosure {

    78  protected:

    79   G1CollectedHeap* _g1h;

    80   ModRefBarrierSet* _mrbs;

    81   CompactPoint _cp;

    82   HeapRegionSetCount _humongous_regions_removed;

    84   virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end);

    85   void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end);

    86   void free_humongous_region(HeapRegion* hr);

    87   bool is_cp_initialized() const { return _cp.space != NULL; }

    89  public:

    90   G1PrepareCompactClosure() :

    91     _g1h(G1CollectedHeap::heap()),

    92     _mrbs(_g1h->g1_barrier_set()),

    93     _humongous_regions_removed() { }

    95   void update_sets();

    96   bool doHeapRegion(HeapRegion* hr);

    97 };

    99 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/g1/g1MarkSweep.hpp@a248d0be1309

src/share/vm/gc_implementation/g1/g1MarkSweep.hpp